Albert Yu

Department of Computer Science,
Duke University.

Office: LSRC D211.
Email: syu at cs.duke.edu

• Research
• 4. Top-k preference subscriptions
  3. Range top-k subscriptions
  2. Dissemination network design
  1. Prosem system demonstration
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Dissemination network design for wide-area publish/subscribe.

We study the problem of assigning subscribers to brokers in a wide-area content-based publish/subscribe system, considering not only similarities in subscription interests but also their network locations and event distribution. The optimization problem that balances multiple performance criteria including bandwidth, delay, and load balance is NP-complete, so systems have turned to heuristics and/or simpler algorithms that ignore some performance criteria. Evaluating these approaches has been challenging because optimal solutions remain elusive for realistic problem sizes. To enable proper evaluation, we develop a Monte Carlo approximation algorithm with good theoretical properties and robustness to workload variations.

Publications:

• Albert Yu, Pankaj K. Agarwal, and Jun Yang. "Subscriber Assignment for Wide-Area Content-Based Publish/Subscribe." In Proceedings of the 27th International Conference on Data Engineering (ICDE '11), Hannover, Germany, April 2011. paper.
• Albert Yu, Pankaj K. Agarwal, and Jun Yang. "Generating Wide-Area Content-Based Publish/Subscribe Workloads." In Proceedings of the 5th International Workshop on Networking Meets Databases (NetDB '09), Big Sky, Montana, USA, October 2009. paper.